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B737 captain aborted takeoff after observing a B747 under tow crossing the runway. When questioned, tower seemed unaware of the intruder.
| Attributes | |
| ACN | 510585 |
| Time | |
| Date | 200105 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : mia.airport |
| State Reference | FL |
| Altitude | agl single value : 0 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : takeoff roll |
| Flight Plan | IFR IFR |
| Aircraft 2 | |
| Controlling Facilities | tower : mia.tower |
| Operator | common carrier : air carrier |
| Make Model Name | B747 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : taxi |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Events | |
| Anomaly | conflict : ground critical ground encounters : vehicle ground encounters other incursion : runway non adherence : published procedure non adherence : required legal separation |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : rejected takeoff |
| Consequence | faa : reviewed incident with flight crew Other |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error Intra Facility Coordination Failure other |
Narrative:
Cleared for takeoff runway 9L. Shortly after takeoff roll began, a B747 under tow began to cross runway right to left. First officer said the aircraft was on the connector taxiway beyond the end of runway 9L. As the takeoff roll progressed I became convinced that the B747 was indeed on the runway. I initiated the abort of 125 KTS and stopped short of where the aircraft was crossing. Tower seemed unaware of the B747 crossing. Consulted the brake cooling chart, made PA, called maintenance and decided to return to gate because of brake temperatures. After gate arrival I contacted dispatch for re-release. Maintenance inspected aircraft for brake and tire damage and signed off aircraft logbook. Departed without further incident. Copilot on jump seat and first officer heard takeoff clearance after I asked the tower to repeat the clearance. The first clearance was garbled. When I asked the tower about the B747 crossing they said they did not know what the problem was.
Original NASA ASRS Text
Title: B737 CAPT ABORTED TKOF AFTER OBSERVING A B747 UNDER TOW XING THE RWY. WHEN QUESTIONED, TWR SEEMED UNAWARE OF THE INTRUDER.
Narrative: CLRED FOR TKOF RWY 9L. SHORTLY AFTER TKOF ROLL BEGAN, A B747 UNDER TOW BEGAN TO CROSS RWY R TO L. FO SAID THE ACFT WAS ON THE CONNECTOR TXWY BEYOND THE END OF RWY 9L. AS THE TKOF ROLL PROGRESSED I BECAME CONVINCED THAT THE B747 WAS INDEED ON THE RWY. I INITIATED THE ABORT OF 125 KTS AND STOPPED SHORT OF WHERE THE ACFT WAS XING. TWR SEEMED UNAWARE OF THE B747 XING. CONSULTED THE BRAKE COOLING CHART, MADE PA, CALLED MAINT AND DECIDED TO RETURN TO GATE BECAUSE OF BRAKE TEMPS. AFTER GATE ARR I CONTACTED DISPATCH FOR RE-RELEASE. MAINT INSPECTED ACFT FOR BRAKE AND TIRE DAMAGE AND SIGNED OFF ACFT LOGBOOK. DEPARTED WITHOUT FURTHER INCIDENT. COPLT ON JUMP SEAT AND FO HEARD TKOF CLRNC AFTER I ASKED THE TWR TO REPEAT THE CLRNC. THE FIRST CLRNC WAS GARBLED. WHEN I ASKED THE TWR ABOUT THE B747 XING THEY SAID THEY DID NOT KNOW WHAT THE PROB WAS.
Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.